WO2023074212A1

WO2023074212A1 - Absorbent article

Info

Publication number: WO2023074212A1
Application number: PCT/JP2022/035526
Authority: WO
Inventors: 圭佑倉持
Original assignee: 大王製紙株式会社
Priority date: 2021-10-28
Filing date: 2022-09-22
Publication date: 2023-05-04
Also published as: JP2023065958A; TW202320725A

Abstract

This absorbent article comprises an elongated body having a liquid-permeable front surface sheet, a liquid-impermeable rear surface sheet, an absorber provided between the front surface sheet and the rear surface sheet, and a recessed groove extending in the longitudinal direction and formed on the surface on the front surface sheet side. A high compression part is formed in the recessed groove, and the high compression part includes a first high compression part having a wavy line shape extending in the longitudinal direction, and a second high compression part having a discontinuous wavy line shape that conforms to a virtual wavy line extending in the longitudinal direction and intersecting the first high compression part.

Description

absorbent article

The present invention relates to absorbent articles.

Absorbent articles such as sanitary napkins, panty liners, and incontinence pads generally have an absorbent body between a liquid-permeable topsheet and a liquid-impermeable backsheet. Among such absorbent articles, there is known one in which a concave groove is formed on the surface side for receiving and diffusing body fluid discharged in large amounts at one time.

For example, in Patent Document 1, an absorbent body has an upper absorbent body on the skin-contacting side and a lower absorbent body on the non-skin contacting side, and a medium-high absorbent body formed by the upper absorbent body and the lower absorbent body is disclosed. The part has a recess extending in the longitudinal direction formed on the skin-contacting surface side, and the part forming the recess of the mid-high part is a protrusion on the lower surface of the upper absorbent body that protrudes toward the non-skin-contacting surface side. An absorbent article is disclosed having a recess in the upper surface of a lower absorbent body that is integral with and in contact with.

JP 2009-112590 A

However, in the absorbent article described in Patent Document 1, since the recesses are less rigid than other parts, the recesses are easily deformed when pressure from the legs is applied from both sides in the width direction when worn. deformation may impair its ability to receive and diffuse bodily fluids.

In view of the above points, one aspect of the present invention is an absorbent article in which grooves extending in the longitudinal direction are formed on the surface on the side of the top sheet, in which deformation of the grooves during wearing can be suppressed. An object is to provide an absorbent article.

In one embodiment of the present invention, a liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber provided between the topsheet and the backsheet, and an absorber formed on the surface of the topsheet. an elongated body having a longitudinally extending recess formed therein, wherein the recess defines a highly compressed portion, the highly compressed portion extending in the longitudinal direction; a first high compression portion having an existing wavy line shape; and a second high compression portion having a discontinuous wavy line shape along an imaginary wavy line extending in the longitudinal direction and intersecting the first high compression portion. .

According to one aspect of the present invention, there is provided an absorbent article in which a concave groove extending in the longitudinal direction is formed on the surface of the topsheet side, and which can suppress deformation of the concave groove when worn. can do.

1 is a plan view of an absorbent article according to one embodiment; FIG. FIG. 2 is a sectional view taken along line II of FIG. 1; FIG. 2 is a partially enlarged plan view of the concave groove shown in FIG. 1; 4 is an enlarged view of part A of FIG. 3; FIG. FIG. 4 is an enlarged view of a portion B of FIG. 3; FIG. 4 is a schematic diagram of the II-II cross section of FIG. 3; It is a partial enlarged plan view showing the first modification of the high compression part according to one embodiment. It is a partial enlarged plan view showing the second modification of the high compression part according to one embodiment. It is a partial enlarged plan view showing the third modification of the high compression part according to one embodiment. FIG. 4 is a plan view showing a modification of the absorbent article according to one embodiment;

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each drawing, unless there is a particular description, the same reference numerals may be attached to the same or corresponding configurations, and the description thereof may be omitted. In this specification, the longitudinal direction of the absorbent article 1 is defined as a first direction D1, and the lateral direction (width direction) of the absorbent article 1 is defined as a second direction D2. In this specification, the first direction D1 is also used to indicate the longitudinal direction of the groove 11 in plan view. The second direction D2 is also used to indicate the lateral direction (width direction) of the groove 11 in plan view. The longitudinal direction of the absorbent article 1 corresponds to the front-rear direction of the wearer, the front indicates the wearer's ventral side, and the rear indicates the wearer's dorsal side.

1 is a plan view of an absorbent article according to one embodiment, and FIG. 2 is a cross-sectional view taken along line II of FIG. 3 is a partially enlarged plan view of the groove shown in FIG. 1. FIG. 4 is an enlarged view of the A portion of FIG. 3, and FIG. 5 is an enlarged view of the B portion of FIG. FIG. 6 is a schematic diagram of the II-II section of FIG. FIG. 7 is a partially enlarged plan view showing a first modification of the high compression section according to one embodiment, and FIG. 8 is a partially enlarged plan view showing a second modification of the high compression section according to one embodiment, FIG. 9 is a partially enlarged plan view showing a third modified example of the high compression portion according to one embodiment.

As shown in FIGS. 1 and 2, an absorbent article 1 comprises a liquid-impermeable backsheet 2, a liquid-permeable topsheet 3, and an absorbent body 4 provided between these

sheets

2 and 3. A main body (absorbent article main body) 10 is provided. In order to retain the shape of the absorbent body 4, the absorbent body 4 may be wrapped with a wrapping sheet (not shown) made of crepe paper, non-woven fabric, or the like. When using the absorbent article 1, the absorbent article 1 is worn so that the back sheet 2 side of the absorbent article 1 is fixed to the crotch portion of shorts (underwear) or the like, and the top sheet 3 side faces the skin. Although the absorbent article 1 does not have wings in the embodiment shown in FIG. 1, it may have wings or hip hold flaps.

The absorbent article body 10 as a whole has a predetermined length in the longitudinal direction (first direction D1 in the drawing) and a predetermined length in the lateral direction (second direction D2 in the drawing) orthogonal to the longitudinal direction. It has an elongated shape (elongated shape) with a width of . Although the width of the absorbent article main body 10 is substantially constant in the illustrated example, it may vary along the longitudinal direction. The absorbent article main body 10 may have a shape and structure substantially symmetrical with respect to a center line (longitudinal center line) CL extending in the longitudinal direction. Also, it may have an asymmetrical shape and structure as long as the predetermined effects of the embodiment are achieved.

40 in the absorbent article main body 10 is a region (body fluid discharge port corresponding region) 40 corresponding to a body fluid discharge port such as a blood discharge port and a urination port of the wearer when worn. The absorbent article 1 has a central region M including the bodily fluid outlet corresponding region 40 , a front region F in front of the central region M, and a rear region R behind the central region M. The central region M may be a region that roughly corresponds to the crotch region from the urination opening to the anus of the wearer when worn. The rear region R is a region corresponding to the groove of the wearer's buttocks, specifically, a region extending in the front-rear direction including a portion corresponding to the groove of the wearer's buttocks (region corresponding to the buttock groove). The rear region R can be said to be a region covering the entire gluteal cleft, or a region from the rear of the perineum or the vicinity of the anus to the vicinity of the lower end of the tailbone. The front end of the rear region R can be positioned approximately 110 to 170 mm rearward from the front end of the absorbent article 1 and approximately 30 to 60 mm rearward from the body fluid outlet corresponding region 40 .

In this embodiment, an example in which the length of the front region F and the length of the rear region R are substantially the same is shown, but the length of the rear region R may be longer than the length of the front region F, and the length of the front region R may be longer than the length of the front region F. The length of the region F may be longer than the length of the rear region R.

The total length of the absorbent article 1 is preferably 140-360 mm, more preferably 170-270 mm, and even more preferably 200-260 mm. The longitudinal length of the rear region R can be 50 to 250 mm.

At the front and rear edge portions of the absorbent body 4, as shown by hatching in FIG. joined by On the sides of the absorbent body 4, the side

nonwoven fabrics

7, 7 provided along the longitudinal direction on both sides of the topsheet 3 side and the backsheet 2 are joined by the above-mentioned adhesive means. Wings or hip hold flaps as described above may be formed.

As the back sheet 2, a sheet material having at least water impermeability, such as an olefin resin sheet such as polyethylene or polypropylene, can be used. A laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or a laminated sheet of a nonwoven fabric in which a waterproof film is interposed to substantially ensure liquid impermeability can be used. Moreover, from the viewpoint of preventing stuffiness, it is more desirable to use a material having moisture permeability. Such water-impervious/moisture-permeable sheet materials are produced by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction. Porous sheets can be used.

The surface sheet 3 is a liquid-permeable sheet that allows bodily fluids such as menstrual blood, vaginal discharge, and urine to quickly pass through. As the surface sheet 3, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is preferably used. The material fibers that make up the nonwoven fabric include, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cupra, blended fibers thereof, and natural fibers such as cotton. It can be used in combination of two or more. Examples of nonwoven fabric processing methods include spunlace, spunbond, thermal bond, meltblown, needle punch, and the like. Among these processing methods, the spunlace method is preferable because it can produce a soft nonwoven fabric, the spunbond method is preferable because it can produce a nonwoven fabric with excellent drapeability, and the thermal bonding method is preferable because it can produce a bulky and soft nonwoven fabric. In addition, composite fibers such as core-sheath type fibers, side-by-side type fibers, split type fibers, etc. can be used in which a fiber having a high melting point is used as a core and a fiber having a low melting point is used as a sheath.

The absorbent body 4 interposed between the back sheet 2 and the top sheet 3 is not limited as long as it can absorb and retain bodily fluids, but it preferably contains flocculent pulp and a water-absorbent polymer. As the water absorbent polymer, super absorbent polymer granule powder (SAP), super absorbent polymer fiber (SAF) and combinations thereof can be used. The pulp includes chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Broad-leaved trees, softwoods, and the like are used as raw materials for chemical pulp, and softwoods are preferably used because of their long fiber length.

Synthetic fibers may also be mixed in the absorber 4. As synthetic fibers, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. can also be used. In addition, composite fibers such as core-sheath type fibers, side-by-side type fibers, split type fibers, etc., in which a fiber having a high melting point is used as a core and a fiber having a low melting point is used as a sheath, can also be used. It is also possible to use hydrophobic fibers surface-treated with a hydrophilizing agent to impart affinity to body fluids.

The thickness of the absorbent body 4 can be in the range of 0.5 to 25 mm, preferably in the range of 1.5 to 6.5 mm. The absorbent body 4 may not have a uniform thickness over the entire surface, and may have a structure in which the region 40 corresponding to the body fluid discharge port, the region in the vicinity thereof, and the central portion in the width direction of the rear region R are swollen. . Moreover, the absorbent body 4 is preferably manufactured by a stacking or air-laid method.

As the side nonwoven fabric 7, a water repellent nonwoven fabric or a hydrophilic treated nonwoven fabric can be used. For example, in order to improve the effect of preventing permeation of menstrual blood, vaginal discharge, and the like, or to improve the texture, it is preferable to use a water-repellent nonwoven fabric coated with a silicon-based or paraffin-based water repellent agent. In order to increase the absorbability of menstrual blood and the like in the wings or hip hold flaps, it is preferable to use a hydrophilically treated nonwoven fabric as the material of the nonwoven fabric. As the type of nonwoven fabric, an air-through nonwoven fabric that is soft and resistant to creases and wrinkles is preferable.

As shown in FIG. 2, the side of the back sheet 2 facing the underwear (non-skin side) is provided with a non-slip portion 8 for fixing the absorbent article 1 to the crotch portion of shorts or the like during wearing. ing. The anti-slip portion 8 is preferably made of an adhesive layer. In the present embodiment, the anti-slip portions 8 are provided one by one on both sides of the groove 11 in the width direction D2 over the front region F, the central region M, and the rear region R, but are not limited to this. It can be provided at any position in the area except for the projection area of the concave groove 11 . In other words, it is preferable that the anti-slip portion 8 is not provided in the projected area of the concave groove 11 . For example, the anti-slip portions 8 may be provided on both sides (front and rear) of the groove 11 in the longitudinal direction D1. The number, shape, and size of the anti-slip portions 8 are not limited to those illustrated.

As shown in FIG. 1 , in the absorbent article 1 of the present embodiment, grooves 11 that are low compression portions e1 extending in the longitudinal direction D1 are formed on the surface on the side of the topsheet 3 . A high compression portion e2 is formed at the end. The concave groove 11 and the highly compressed portion e2 are formed as grooves that are recessed toward the back sheet 2 when the top sheet 3 and the absorbent body 4 are integrally compressed. The grooves 11 and the highly compressed portions e2 can be formed by passing a laminate obtained by laminating the surface sheet 3 on the absorbent body 4 between a pair of pressure rolls. For example, a convex roll and a flat roll can be arranged on the surface sheet 3 side and the absorbent body 4 side of the laminate, and pressure can be applied from both rolls. Note that the absorbent article 1 has a non-compressed portion 14 that is not compressed in the region outside the groove 11 .

The concave groove 11 has the function of receiving and temporarily storing body fluid and guiding it in the longitudinal direction D1. During normal use of the absorbent article 1, body fluids are discharged directly to the central region M including the region 40 corresponding to the body fluid outlet. In particular, when a large amount of body fluid is discharged at once, the concave groove 11 can receive and temporarily store the body fluid. The bodily fluid received by the grooves 11 is absorbed by the absorbent body 4 through the surface sheet 3 at the position where it is received, but part of the body fluid may diffuse and migrate in the absorbent body 4 in the planar direction. During diffusion, body fluids can be guided in the longitudinal direction D1 along the grooves 11 (lowly compressed portions e1) where the absorber 4 has a higher density than the non-compressed portions 14 that are not compressed.

The concave groove 11 is preferably arranged on the longitudinal centerline CL, and preferably has a length (predetermined length) smaller than the length of the absorber 4 in the longitudinal direction D1 on the centerline CL. The length of the groove 11 in the longitudinal direction D1 is preferably 50 to 160 mm, more preferably 55 to 80 mm, from the viewpoint of receiving body fluid and guiding it in the longitudinal direction D1. The length (width) of the groove 11 in the width direction D2 is preferably 3 to 15 mm, more preferably 4 to 8 mm, from the viewpoint of receiving body fluid and guiding it in the longitudinal direction D1. In this embodiment, the groove 11 is provided in the central region M, but may be provided over the front region F and the central region M, or the front region F, the central region M, and the rear region R. .

The highly compressed portion e2 is a portion that is further compressed than the bottom surface of the groove 11 (lowly compressed portion e1). As shown in FIG. 3, the high-pressing portion e2 includes a first high-pressing portion 12 having a (continuous) wavy shape extending in the longitudinal direction D1 and a first high-pressing portion 12 extending in the longitudinal direction D1. and a second high compression portion 13 having a discontinuous wavy line shape along imaginary wavy lines 21 that intersect. A plurality of intersections 22 where the first highly compressed portion 12 and the virtual wavy line 21 intersect are provided along the longitudinal direction D<b>1 of the groove 11 . Here, the discontinuous wavy line shape refers to a shape composed of a plurality of wavy line elements 131, such as a broken line, an intermittent line separated in the middle, or the like.

With this configuration, in the width direction D2 of the groove 11, the second highly compressed portion 13 is positioned in a region where the first highly compressed portion 12 is not positioned. A highly compressed portion e2 is formed over the entire length. Therefore, the rigidity can be increased over the entire surfaces in the longitudinal direction D1 and the width direction D2 of the groove 11, and deformation of the groove 11 is suppressed when pressure from the legs is applied from both sides in the width direction D2 during mounting. be able to.

The width (length in the lateral direction) of the first high-pressing portion 12 is preferably 0.5 mm to 3.0 mm, more preferably 1.0 mm to 2.0 mm. The maximum width of the second high-compression portion 13 is preferably 0.5 mm to 3.0 mm, which is the same as the width of the first high-compression portion 12, and more preferably 1.0 mm to 2.0 mm. By setting the widths of the first highly compressed portion 12 and the second highly compressed portion 13 within the range of 0.5 mm to 3.0 mm, respectively, the rigidity of the concave groove 11 can be increased, and the width direction D2 at the time of mounting can be increased. Deformation of the concave groove 11 can be further suppressed when receiving pressure from the legs from both sides. In addition, since the width of the first highly compressed portion 12 and the second highly compressed portion 13 are within the range of 1.0 mm to 2.0 mm, respectively, the rigidity of the concave groove 11 can be further increased, and the When receiving leg pressure from both sides in the width direction D2, deformation of the concave groove 11 can be further suppressed.

The first highly compressed portion 12 and the virtual wavy line 21 preferably have shapes that are line-symmetrical to each other with respect to the vertical center line 20 that bisects the length of the groove 11 in the width direction D2. The first highly compressed portion 12 and the virtual wavy line 21 are mutually symmetrical shapes with respect to a vertical center line 20 that bisects the length of the groove 11 in the width direction D2. The apex of the wavy line-shaped wave and the apex of the wave of the virtual wavy line 21 are arranged symmetrically. That is, the highly compressed portion e2 as a whole has a shape that is symmetrical with respect to the longitudinal center line 20 and curved outward on both sides in the width direction D2. Thereby, when receiving leg pressure from both sides in the width direction D2 at the time of wearing, the received pressure can be dispersed in the longitudinal direction D2 by the first high compression portion 12 and the second high compression portion 13 . Therefore, deformation of the concave groove 11 can be further suppressed. The vertical center line 20 that bisects the length of the groove 11 in the width direction D2, or the apex of the wavy line shape of the first highly compressed portion 12 and the apex of the wave of the imaginary wavy line 21 are arranged symmetrically. , etc. do not need to be strictly bisectors or strictly symmetrical arrangements, as long as they are bisectors as a whole or symmetrically arranged as long as the predetermined effects are achieved good.

The highly compressed portion e2 is composed of a pattern in which repeating units P having point-symmetrical shapes centering on the intersection 22 of the first highly compressed portion 12 and the virtual dashed line 21 are repeated in the longitudinal direction D1. That is, the highly compressed portions e2 formed in the repeating unit P are alternately arranged in the normal position and the reversed position in the longitudinal direction D1 over the longitudinal direction D1 of the groove 11. pattern. The number of repeating units P is preferably 3 to 5, but can be set arbitrarily.

Since the highly compressed portion e2 is configured in a pattern in which the repeating unit P is repeated in the longitudinal direction D1, the rigidity can be uniformly increased over the longitudinal direction D1 of the groove 11, and the width direction at the time of mounting. The deformation of the groove 11 can be further suppressed when receiving pressure from the legs from both sides of D2.

The intersections 22 are preferably provided between the wavy line elements 131 . In other words, it is preferable not to form the second high compression portion 13 near the intersection 22 . With this configuration, weakening of the absorbent article body 10 due to excessively high compression near the intersection 22 can be avoided. In addition, since the first highly compressed portion 12 and the second highly compressed portion 13 do not overlap, the rigidity can be increased more uniformly over the longitudinal direction D1 of the concave groove 11. Deformation of the concave groove 11 can be further suppressed when receiving pressure from the leg.

The highly compressed portion e2 and the peripheral edge of the concave groove 11 are separated, and the distance between the highly compressed portion e2 and the peripheral edge of the concave groove 11 is preferably 0.5 mm to 2.0 mm. Here, the distance between the highly compressed portion e2 and the peripheral edge of the groove 11 means the shortest distance between the highly compressed portion e2 and the peripheral edge of the groove 11 . The distance between the first highly compressed portion 12 and the peripheral edge of the groove 11 is a distance L1 shown in FIG. In the case of the example shown in FIG. 5, the distance between the second highly compressed portion 13 and the periphery of the groove 11 is the distance L2. is.

Since the distances L1 and L2 between the highly compressed portion e2 and the peripheral edge of the groove 11 are 0.5 mm to 2.0 mm, as shown in FIG. A low compression portion e1 having a length of 0.5 mm to 2.0 mm in the width direction D2 is arranged between them. In other words, the region 0.5 mm to 2.0 mm from the periphery of the highly compressed portion e2 is the low compressed portion e1, and the high compressed portion e2 is surrounded by the low compressed portion e1. With this configuration, the highly compressed portion e2 does not come into contact with the uncompressed non-compressed portion 14 outside the recessed groove 11, so that the peripheral edge of the highly compressed portion e2 and the outside of the peripheral edge of the highly compressed portion e2 A step occurring at the boundary can be reduced. Therefore, when receiving leg pressure from both sides in the width direction D2 at the time of wearing, it is possible to avoid partial breakage of the absorbent article body 10 by avoiding the occurrence of large bending stress or large stress concentration at the corners. can.

As shown in FIG. 6, the distance L3 between the highly compressed portion e2 and the peripheral edge of the recessed groove 11 opposite to the width direction D2 is also preferably 0.5 mm to 2.0 mm, like the distances L1 and L2. As a result, it is possible to prevent the absorbent article body 10 from tearing when receiving pressure from the legs from both sides in the width direction during wearing.

Further, when the highly compressed portion e2 is embossed, there is a risk that the surface sheet 3 or the like will tear along the boundary between the non-compressed portion 14 and the peripheral edge of the highly compressed portion e2. Since the distances L1 and L2 from the peripheral edge are 0.5 mm to 2.0 mm, the low-pressed portion e1 around the highly-pressed portion e2 becomes an escape route for the pressing force when the high-pressed portion e2 is embossed. Since the pressure is dispersed, it is possible to avoid tearing of the surface sheet 3 and the like due to compression, and it is possible to improve the operability.

The edges of the embossing roll are preferably rounded in order to prevent tearing of the surface sheet 3 and the like due to compression. The angle R of the edge of the embossing roll is preferably R0.2 or more, more preferably R0.2 to 1.0, and even more preferably R0.2 to 0.5. As a result, it is possible to prevent tearing of the surface sheet 3, etc., and since the material such as the surface sheet 3 is less caught, the material is caught by the embossing roll during embossing of the high pressure part e2, and the material is peeled off. can be prevented. That is, as shown in FIG. 6, in the cross-sectional shape of the highly compressed portion e2, the corner R of the bottom edge 121 is preferably 0.2 mm or more.

Furthermore, the first highly compressed portion 12 and the imaginary wavy line 21 are mutually symmetrical with respect to a vertical center line 20 that bisects the length of the groove 11 in the width direction D2. At the time of embossing, it is easy to apply pressure uniformly, and the workability can be improved. In addition, when the highly compressed portion e2 is configured in a pattern in which the repeating unit P having a point-symmetrical shape centering on the intersection 22 of the first highly compressed portion 12 and the virtual wavy line 21 is repeated in the longitudinal direction D1, At the time of embossing of the high-pressing portion e2, the pressure is easily applied uniformly, and the workability can be improved.

In the example shown in FIGS. 1 and 3 , the second high compression portion 13 includes a plurality of wavy line elements 131 having a shape along part of the virtual wavy line 21 , and between adjacent intersection points 22 , the wavy line elements 131 are Although two pieces are arranged, the number is not limited to this and can be an arbitrary number.

For example, in the example shown in FIG. 7, one wavy line element 131 of the second high compression portion 13 is arranged between adjacent intersections 22 . In the example shown in FIG. 8 , three wavy line elements 131 of the second high compression portion 13 are arranged between the adjacent intersections 22 .

It is preferable that one to three wavy line elements 131 of the second high compression portion 13 are arranged between adjacent intersections 22 . By arranging 1 to 3 wavy line elements 131 between adjacent intersections 22, the second high compression portion 13 generates sufficient resistance against leg pressure from both sides in the width direction D2, The rigidity of the groove 11 can be further increased, and deformation of the groove 11 can be further suppressed.

In the example shown in FIGS. 1 and 3, the wavy line element 131 of the second high-pressing portion 13 has a leaf shape in plan view, in which the central portion bulges and the width decreases toward both ends. The shape is not limited to this, and may be any shape as long as it follows the virtual broken line 21 . For example, in the examples shown in FIGS. 7 and 8, the wavy line element 131 of the second high compression portion 13 has an arcuate shape with a constant width. In addition, in the example shown in FIGS. 1 and 3 , the highly compressed portion e2 has the shape of a climbing plant as a whole, but the shape of the highly compressed portion e2 is not limited to this, and the shape of the wavy line element 131 in a plan view makes the highly compressed portion e2 design can be added to

Also, as shown in FIG. 9 , the first highly compressed portion and the virtual wavy line 21 may each have a double wavy line shape separated in the width direction D2 of the groove 11 . With this configuration, it is possible to generate sufficient resistance to the pressure of the legs from both sides in the width direction D2, to further increase the rigidity of the groove 11, and to further suppress the deformation of the groove 11.

Next, a modification of the absorbent article according to this embodiment will be described with reference to FIG. FIG. 10 is a plan view showing a modification of the absorbent article according to one embodiment.

The absorbent article 1 may have other compressed grooves in addition to the concave grooves 11 and the highly compressed portions e2. In the example shown in FIG. 10, the absorbent article 101 has oblique compressed grooves 112 in addition to the concave grooves 11 and the highly compressed portions e2. Specifically, a pair of front oblique direction compression members respectively connected to the front end 111f of the groove 11 in the longitudinal direction D1 and extending so that the distance between them increases toward the front on the surface of the topsheet 3 side. Grooves 112f, 112f and a pair of rear oblique compressed

grooves

112r, 112r connected to the rear end 111r of the groove 11 in the longitudinal direction D1 and extending so that the distance between them increases toward the rear. is provided.

In the absorbent article 101 shown in FIG. 10, the front oblique compression grooves 112f and 112f and the rear

oblique compression grooves

112r and 112r make it easy for the absorbent article 1 to bend at the compression grooves. It can encourage transformation to Therefore, when receiving pressure from the legs from both sides in the width direction D2 at the time of wearing, it is possible to suppress the pressure from reaching the concave groove 11 and suppress the deformation of the concave groove 11 .

In addition, the front obliquely compressed grooves 112f, 112f and the rearward obliquely compressed

grooves

112r, 112r are composed of a low compression portion e3 and a high compression portion e4 that is compressed with a pressure higher than that of the low compression portion e3. and With this configuration, the front oblique compression grooves 112f, 112f and the rear

oblique compression grooves

112r, 112r can be provided with appropriate rigidity, and deformation into a desired shape at the time of mounting can be promoted. Therefore, when receiving pressure from the legs from both sides in the width direction D2 at the time of wearing, it is possible to further suppress the pressure from reaching the grooves 11 and to further suppress the deformation of the grooves 11 .

Although the embodiment has been described as above, the above embodiment is presented as an example, and the present invention is not limited by the above embodiment. The above embodiments can be implemented in various other forms, and various combinations, omissions, replacements, changes, etc. can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

Specific embodiments of the present invention are described below.

(Appendix 1)
The form according to Supplementary Note 1 is formed on a liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber provided between the topsheet and the backsheet, and the surface on the topsheet side. an elongated body having a longitudinally extending recess formed therein, wherein the recess defines a highly compressed portion, the highly compressed portion extending in the longitudinal direction; a first high compression portion having an existing wavy line shape; and a second high compression portion having a discontinuous wavy line shape along an imaginary wavy line extending in the longitudinal direction and intersecting the first high compression portion. .

According to the aspect of Supplementary Note 1, in the width direction of the concave groove, the second highly compressed portion is positioned in a region where the first highly compressed portion is not positioned, and the entire surface of the concave groove in the longitudinal direction and the width direction is A high compression section is formed over it. Therefore, the rigidity can be increased over the entire surface of the groove in the longitudinal direction and the width direction, and deformation of the groove can be suppressed when pressure from the legs is applied from both sides in the width direction when the groove is worn.

(Appendix 2)
In the form according to Supplementary Note 2, the first highly compressed portion and the virtual wavy line have shapes that are line-symmetrical to each other with respect to a vertical center line that bisects the length of the groove in the width direction.

According to the aspect of Supplementary Note 2, with respect to the vertical center line that bisects the length of the groove in the width direction, the apex of the wavy line-shaped wave of the first high compression portion and the apex of the wave of the virtual wavy line are arranged symmetrically. That is, the high compression portion has a shape that is symmetrical with respect to the longitudinal center line and curved outward on both sides in the width direction. Accordingly, when pressure is received from both sides in the width direction during wearing, the pressure received can be dispersed in the longitudinal direction by the first high compression portion and the second high compression portion. Therefore, deformation of the concave groove can be further suppressed.

(Appendix 3)
In the form according to appendix 3, the distance between the highly compressed portion and the peripheral edge of the concave groove is 0.5 mm to 2.0 mm.

According to the aspect of Supplementary Note 3, the highly compressed portion does not come into contact with the non-compressed portion that is not compressed outside the recessed groove. It is possible to reduce the level difference that occurs at the boundary between the two, and to prevent tearing when receiving pressure from the legs from both sides in the width direction at the time of wearing.

(Appendix 4)
In the form according to appendix 4, the high compression portion is configured in a pattern in which repeating units having a point-symmetrical shape centering on the intersection of the first high compression portion and the imaginary wavy line are repeated in the longitudinal direction. there is

According to the form according to Supplementary Note 4, the rigidity can be uniformly increased over the longitudinal direction of the groove, and when the leg pressure is applied from both sides in the width direction during mounting, the deformation of the groove is further enhanced. can be suppressed.

(Appendix 5)
In the form according to Supplementary Note 5, the second high compression portion includes a plurality of wavy line elements having a shape along a part of the virtual wavy line, a plurality of the intersections are provided, and between the adjacent intersections, the One to three wavy line elements are arranged.

According to the aspect of Supplementary Note 5, the second high compression portion can generate sufficient resistance to the pressure of the legs from both sides in the width direction, can further increase the rigidity of the groove, and can prevent deformation of the groove. can be further suppressed.

(Appendix 6)
In the form according to Supplementary Note 6, the intersection is provided between the wavy line elements.

According to the aspect of Supplementary Note 6, since the first highly compressed portion and the second highly compressed portion do not overlap, the rigidity can be increased more uniformly over the longitudinal direction of the recessed groove, and the width direction when mounted. Deformation of the concave groove can be further suppressed when receiving pressure from the legs from both sides.

(Appendix 7)
In the form according to Supplementary Note 7, the first highly compressed portion and the virtual wavy line each have a double wavy line shape separated in the width direction of the concave groove.

According to the form according to Supplementary Note 7, it is possible to generate sufficient resistance to the pressure of the legs from both sides in the width direction, to further increase the rigidity of the groove, and to further suppress the deformation of the groove. .

(Appendix 8)
In the form according to Supplementary Note 8, a pair of front oblique compressions are connected to the surface on the top sheet side and to the front ends of the grooves in the longitudinal direction, respectively, and extend so that the distance between each other increases as it goes forward. A groove and a pair of rear oblique compression grooves are provided, each connected to the rear end of the groove in the longitudinal direction and extending such that the distance between them increases toward the rear.

According to the aspect of Supplementary Note 8, the front oblique compression grooves and the rear oblique compression grooves make it easier for the absorbent article to bend at the compression grooves, which facilitates deformation into a desired shape when worn. can. Therefore, when receiving pressure from the legs from both sides in the width direction at the time of wearing, it is possible to suppress the pressure from reaching the concave groove, thereby suppressing deformation of the concave groove.

This international application claims priority based on Japanese Patent Application No. 2021-176397 filed on October 28, 2021, the entire contents of which are incorporated herein by reference.

1, 101 Absorbent article 2 Back sheet 3 Top sheet 4 Absorber 7 Side nonwoven fabric 8 Anti-slip portion 10 Main body 11 Groove 12 First highly compressed portion 121 Edge 13 Second highly compressed portion 131 Wavy element 14 Non-compressed portion 20 Vertical center line 21 imaginary wavy line 22 intersection 40 bodily fluid outlet corresponding region 111f front end 111r rear end 112 oblique compressed groove 112f front oblique compressed groove 112r rear oblique compressed groove e1, e3 low compressed portions e2, e4 high compressed portion P repeating unit CL Center line F Front region M Central region R Rear region D1 First direction (longitudinal direction)
D2 Second direction (width direction)

Claims

A liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber provided between the topsheet and the backsheet, and a longitudinally extending portion formed on the surface facing the topsheet. An absorbent article comprising an elongated body having a concave groove for
A highly compressed portion is formed in the concave groove,
The high-pressing portions include a first high-pressing portion having a wavy line shape extending in the longitudinal direction, and a discontinuous wavy line along an imaginary wavy line extending in the longitudinal direction and intersecting the first high-pressing portion. and a shaped second pressurized portion.
2. The absorbent article according to claim 1, wherein said first highly compressed portion and said imaginary wavy line have shapes that are line-symmetrical to each other with respect to a vertical center line that bisects the widthwise length of said concave groove. .
The absorbent article according to claim 1 or 2, wherein the distance between the highly compressed portion and the peripheral edge of the groove is 0.5 mm to 2.0 mm.
4. Claims 1 to 3, wherein the highly compressed portion is configured in a pattern in which repeating units having a point-symmetrical shape centering on the intersection of the first highly compressed portion and the imaginary broken line are repeated in the longitudinal direction. Absorbent article according to any one of.
The second high compression portion includes a plurality of wavy line elements having a shape along part of the virtual wavy line,
A plurality of the intersections are provided,
5. The absorbent article according to claim 4, wherein 1 to 3 wavy line elements are arranged between the adjacent intersections.
The absorbent article according to claim 4 or 5, wherein the intersection is provided between the wavy line elements.
The absorbent article according to any one of claims 1 to 6, wherein the first highly compressed portion and the virtual wavy line each have a double wavy line shape separated in the width direction of the concave groove.
a pair of front oblique compressed grooves extending on the surface of the topsheet side, connected to the front ends of the grooves in the longitudinal direction and extending so that the distance between them increases toward the front; 8. A pair of rear oblique compression grooves respectively connected to the rear ends in the longitudinal direction and extending so that the distance between them increases toward the rear. The absorbent article described.